Question

Statement -I : Basic strength of $R{S}^{-}>R{O}^{-}$
Statement -Il : Nucleophilicity of $R{S}^{-}>R{O}^{-}$

• A. Both l and ll are correct
• B. Both l and ll are incorrect
• C. l is correct, ll is incorrect
• D. l is incorrect, ll is correct

Answer 1

The correct option is D l is incorrect, ll is correct

$RSH$ is the stonger acid than $ROH$. Since conjugate state is more stable, stronger the acid , the weaker is the conjugate base.

Basicity $R{S}^{-}<R{O}^{-}$

Nucleophilicity $R{S}^{-}>R{O}^{-}$.

Down a group, basicity and nucleophilicity are inversely proportional.